helm/ocaml/tactics/tacticChaser.ml

   1 (* Copyright (C) 2000-2002, HELM Team.
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   3  * This file is part of HELM, an Hypertextual, Electronic
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   5  * Department, University of Bologna, Italy.
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  23  * http://cs.unibo.it/helm/.
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  25
  26 (******************************************************************************)
  27 (*                                                                            *)
  28 (*                               PROJECT HELM                                 *)
  29 (*                                                                            *)
  30 (*                Claudio Sacerdoti Coen <sacerdot@cs.unibo.it>               *)
  31 (*                                 18/02/2003                                 *)
  32 (*                                                                            *)
  33 (*                                                                            *)
  34 (******************************************************************************)
  35
  36 module I = MQueryInterpreter
  37 module U = MQGUtil
  38 module G = MQueryGenerator
  39
  40   (* search arguments on which Apply tactic doesn't fail *)
  41 let matchConclusion mqi_handle ?(output_html = (fun _ -> ())) ~choose_must () ~status =
  42  let ((_, metasenv, _, _), metano) = status in
  43  let (_, ey ,ty) = List.find (function (m,_,_) -> m=metano) metasenv in
  44   let list_of_must, only = CGMatchConclusion.get_constraints metasenv ey ty in
  45   let must = choose_must list_of_must only in
  46   let result =
  47          I.execute mqi_handle
  48             (G.query_of_constraints
  49         (Some U.universe_for_match_conclusion)
  50         (must,[],[]) (Some only,None,None)) in
  51         let uris =
  52          List.map
  53                 (function uri,_ ->
  54                         MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format' uri
  55                 ) result in
  56          let uris',exc =
  57                 let rec filter_out =
  58                  function
  59                                 [] -> [],""
  60                         | uri::tl ->
  61                                  let tl',exc = filter_out tl in
  62                                         try
  63                                          if
  64                                                 (try
  65                                                  ignore
  66                                                         (PrimitiveTactics.apply_tac
  67                                                          ~term:(MQueryMisc.term_of_cic_textual_parser_uri
  68                                                                 (MQueryMisc.cic_textual_parser_uri_of_string uri))
  69                                                          ~status);
  70                                                  true
  71                                                 with ProofEngineTypes.Fail _ -> false)
  72                                          then
  73                                                 uri::tl',exc
  74                                          else
  75                                                 tl',exc
  76                                         with
  77            (ProofEngineTypes.Fail _) as e ->
  78                                                  let exc' =
  79                                                   "<h1 color=\"red\"> ^ Exception raised trying to apply " ^
  80                                                          uri ^ ": " ^ Printexc.to_string e ^ " </h1>" ^ exc
  81                                                  in
  82                                                   tl',exc'
  83                 in
  84                  filter_out uris
  85          in
  86                 let html' =
  87                  " <h1>Objects that can actually be applied: </h1> " ^
  88                  String.concat "<br>" uris' ^ exc ^
  89                  " <h1>Number of false matches: " ^
  90                         string_of_int (List.length uris - List.length uris') ^ "</h1>" ^
  91                  " <h1>Number of good matches: " ^
  92                         string_of_int (List.length uris') ^ "</h1>"
  93                 in
  94                  output_html html' ;
  95                  uris'
  96 ;;
  97